CN202734366U - Air conditioning unit running at low load - Google Patents
Air conditioning unit running at low load Download PDFInfo
- Publication number
- CN202734366U CN202734366U CN 201220321128 CN201220321128U CN202734366U CN 202734366 U CN202734366 U CN 202734366U CN 201220321128 CN201220321128 CN 201220321128 CN 201220321128 U CN201220321128 U CN 201220321128U CN 202734366 U CN202734366 U CN 202734366U
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Abstract
The utility model provides an air conditioning unit running at low load. According to the utility model, a liquid supply expansion valve is connected with an evaporator, the evaporator is connected with a hot-air bypass adjusting valve in parallel and then is connected with a liquid-vapor separator, and the liquid-vapor separator is connected with a compressor to form a circulation loop. In addition, a liquid supply solenoid valve is connected with an air outlet temperature controller, a fan is connected besides the evaporator, and an air suction pressure sensor and a low pressure controller are respectively connected on an air suction pipeline from the liquid-vapor separator to the compressor. The air conditioning unit has the technical effects that under the condition the external load is reduced and the air suction pressure is reduced to be below a low pressure control value, part of high-temperature and high-pressure freezing medium gas is mixed with a freezing medium after condensing throttling, and then the mixed gas is processed by the liquid-vapor separator and then fed into the compressor by utilizing the air outlet temperature controller, a hot-air bypass solenoid valve, the hot-air bypass adjusting valve, a liquid ejection solenoid valve and a liquid ejection expansion valve, so that the air conditioning unit can continuously run with certain minimum load.
Description
Technical field
The utility model relates to a kind of air-conditioning unit, relates in particular to a kind of underrun air-conditioning unit.
Background technology
Existing air-conditioning unit is when external load reduces, and pressure of inspiration(Pi) will descend gradually, and when drop of suction pressure was following to the low pressure controller setting value, compressor was with out of service; Set value when above when pressure of inspiration(Pi) goes back up to low pressure controller, compressor will restart.The on off control mode is simple, but motor start-up is attended by often than heavy current impact, and if the air-conditioning Unit Commitment frequent, not only energy loss is large, also greatly shortens compressor service life.
Summary of the invention
The purpose of this utility model is to provide a kind of underrun air-conditioning unit.
The utility model is achieved like this, it comprises blower fan, evaporimeter, gas-liquid separator, the hot-gas bypass control valve, hot gas bypass solenoid valve, inspiratory pressure sensor, low pressure controller, compressor, condenser, liquid supply electromagnetic valve, the hydrojet magnetic valve, the hydrojet expansion valve, the feed flow expansion valve, the leaving air temp controller, it is characterized in that compressor connects condenser and hot gas bypass solenoid valve, hot gas bypass solenoid valve connects the hot-gas bypass control valve, condenser connects liquid supply electromagnetic valve, liquid supply electromagnetic valve connects the feed flow expansion valve, the feed flow expansion valve connects evaporimeter, be connected gas-liquid separator after evaporimeter and the parallel connection of hot-gas bypass control valve, gas-liquid separator connects compressor and forms a closed circuit.In addition, liquid supply electromagnetic valve connects the leaving air temp controller, evaporimeter next door connecting fan, and gas-liquid separator connects respectively inspiratory pressure sensor and low pressure controller to the suction line of compressor.
Technique effect of the present utility model is: at extraneous load reduction, when drop of suction pressure is following to the low voltage control value, utilize leaving air temp controller, hot gas bypass solenoid valve, hot-gas bypass control valve, hydrojet magnetic valve, hydrojet expansion valve, cold-producing medium after a part of high-temperature high-pressure refrigerant gas and the condensation throttling mixed by gas-liquid separator send into compressor, guarantee that the air-conditioning unit energy moves continuously with a certain minimum load state.
Description of drawings
Fig. 1 is fundamental diagram of the present utility model.
In the drawings 1, blower fan 2, evaporimeter 3, gas-liquid separator 4, hot-gas bypass control valve 5, hot gas bypass solenoid valve 6, inspiratory pressure sensor 7, low pressure controller 8, compressor 9, condenser 10, liquid supply electromagnetic valve 11, hydrojet magnetic valve 12, hydrojet expansion valve 13, feed flow expansion valve 14, leaving air temp controller.
The specific embodiment
As shown in Figure 1, the utility model is achieved like this, compressor 8 connects condenser 9 and hot gas bypass solenoid valve 5, hot gas bypass solenoid valve 5 connects hot-gas bypass control valve 4, condenser 9 connects liquid supply electromagnetic valve 10, and liquid supply electromagnetic valve 10 connects feed flow expansion valve 13, and feed flow expansion valve 13 connects evaporimeter 2, is connected gas-liquid separator 3, closed circuit of gas-liquid separator 3 connection compressors, 8 formation after evaporimeter 2 and hot-gas bypass control valve 4 are in parallel.In addition, liquid supply electromagnetic valve 10 connects leaving air temp controller 14, evaporimeter 2 next door connecting fans 1, and gas-liquid separator 3 connects respectively inspiratory pressure sensor 6 and low pressure controller 7 to the suction line of compressor 8.
1) during unit operation, the refrigerant gas that compressed machine (8) is discharged at first passes through condenser (9) and carries out heat exchange, through the process of the cold-producing medium after heat exchange liquid supply electromagnetic valve (10), after feed flow expansion valve (13) throttling, enter evaporimeter (2), absorb the refrigerant vapour that the extraneous air heat of vaporization becomes low pressure, pass through again gas-liquid separator (3), then sucked by compressor (8) and compress, thereby finished a kind of refrigeration cycle.
2) after leaving air temp reaches predetermined setting value, liquid supply electromagnetic valve (10) is closed, compressor (8) pressure of inspiration(Pi) reduces, the pressure decreased that records when inspiratory pressure sensor (6) is during to the setting value of a little higher than low pressure controller (7), hydrojet magnetic valve (11) and hot gas bypass solenoid valve (5) are opened, realize minimal feed flow, so that unit keeps the continuous operation under the minimum load state.When external load increases, leaving air temp raises, leaving air temp controller (14) action, liquid supply electromagnetic valve (10) is opened, when the pressure that records when inspiratory pressure sensor (6) surpasses the setting value of low pressure controller (7), hydrojet magnetic valve (11) and hot gas bypass solenoid valve (5) are closed the normal circulation of recovery system.
Claims (1)
1. underrun air-conditioning unit, it comprises blower fan, evaporimeter, gas-liquid separator, the hot-gas bypass control valve, hot gas bypass solenoid valve, inspiratory pressure sensor, low pressure controller, compressor, condenser, liquid supply electromagnetic valve, the hydrojet magnetic valve, the hydrojet expansion valve, the feed flow expansion valve, the leaving air temp controller, it is characterized in that compressor connects condenser and hot gas bypass solenoid valve, hot gas bypass solenoid valve connects the hot-gas bypass control valve, condenser connects liquid supply electromagnetic valve, liquid supply electromagnetic valve connects the feed flow expansion valve, the feed flow expansion valve connects evaporimeter, be connected gas-liquid separator after evaporimeter and the parallel connection of hot-gas bypass control valve, gas-liquid separator connects compressor and forms a closed circuit; In addition, liquid supply electromagnetic valve connects the leaving air temp controller, evaporimeter next door connecting fan, and gas-liquid separator connects respectively inspiratory pressure sensor and low pressure controller to the suction line of compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220321128 CN202734366U (en) | 2012-07-05 | 2012-07-05 | Air conditioning unit running at low load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220321128 CN202734366U (en) | 2012-07-05 | 2012-07-05 | Air conditioning unit running at low load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202734366U true CN202734366U (en) | 2013-02-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220321128 Expired - Fee Related CN202734366U (en) | 2012-07-05 | 2012-07-05 | Air conditioning unit running at low load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202734366U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042918A (en) * | 2015-06-02 | 2015-11-11 | 西克制冷（无锡）有限公司 | Parallel compressors unit capable of self-adaptively operating at low load and implementation method thereof |
| CN105737270A (en) * | 2016-02-29 | 2016-07-06 | 四川依米康环境科技股份有限公司 | Low-pressure control and energy adjusting device for air conditioner |
| CN105928277A (en) * | 2016-05-06 | 2016-09-07 | 广东美的暖通设备有限公司 | Control method and system of electromagnetic valve for air conditioner liquid injecting cooling and air conditioner |
| CN106595158A (en) * | 2016-12-22 | 2017-04-26 | 重庆美的通用制冷设备有限公司 | Low-pressure control method, system and air conditioner for unit refrigeration system |
| CN108224823A (en) * | 2018-02-12 | 2018-06-29 | 深圳市亿凌捷科技有限公司 | Full load air-conditioning device and its control method |
| CN109373636A (en) * | 2018-11-09 | 2019-02-22 | 珠海格力电器股份有限公司 | A kind of system and method preventing liquid hammer |
| US10215465B2 (en) | 2015-10-30 | 2019-02-26 | Heatcraft Refrigeration Products Llc | Systems and methods for low load compressor operations |
-
2012
- 2012-07-05 CN CN 201220321128 patent/CN202734366U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042918A (en) * | 2015-06-02 | 2015-11-11 | 西克制冷（无锡）有限公司 | Parallel compressors unit capable of self-adaptively operating at low load and implementation method thereof |
| US10215465B2 (en) | 2015-10-30 | 2019-02-26 | Heatcraft Refrigeration Products Llc | Systems and methods for low load compressor operations |
| CN105737270A (en) * | 2016-02-29 | 2016-07-06 | 四川依米康环境科技股份有限公司 | Low-pressure control and energy adjusting device for air conditioner |
| CN105928277A (en) * | 2016-05-06 | 2016-09-07 | 广东美的暖通设备有限公司 | Control method and system of electromagnetic valve for air conditioner liquid injecting cooling and air conditioner |
| CN105928277B (en) * | 2016-05-06 | 2019-02-15 | 广东美的暖通设备有限公司 | A kind of air-conditioning Liquid injection cooling electromagnetic valve control method, system and air-conditioning |
| CN106595158A (en) * | 2016-12-22 | 2017-04-26 | 重庆美的通用制冷设备有限公司 | Low-pressure control method, system and air conditioner for unit refrigeration system |
| CN108224823A (en) * | 2018-02-12 | 2018-06-29 | 深圳市亿凌捷科技有限公司 | Full load air-conditioning device and its control method |
| CN109373636A (en) * | 2018-11-09 | 2019-02-22 | 珠海格力电器股份有限公司 | A kind of system and method preventing liquid hammer |
| CN109373636B (en) * | 2018-11-09 | 2023-07-04 | 珠海格力电器股份有限公司 | System and method for preventing liquid impact |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20200705 |